LinkedIn Pinpoint

Here is how each clue relates to that word:
A+: A+ relates to the answer "Blood types".
B-: B- relates to the answer "Blood types".
AB+: AB+ relates to the answer "Blood types".
O+ (the most common): O+ (the most common) relates to the answer "Blood types".
O- (universal red cell donor): O- (universal red cell donor) relates to the answer "Blood types".